| Perrierosedum | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Perrierosedum (A.Berger) H.Ohba |
| Species: | P. madagascariense |
| Binomial name | |
| Perrierosedum madagascariense | |
| Synonyms [2] | |
| |
Perrierosedum is a genus of succulent plant in the family Crassulaceae containing only one species, Perrierosedum madagascariense. It is a critically endangered species endemic to Madagascar. [2]
Sedum madagascariense was described by French botanist Joseph Marie Henry Alfred Perrier de la Bâthie in 1923. S. madagascariense was placed in Sedum section Perrierosedum, named in honour of Perrier de la Bâthie, in 1930 by Alwin Berger. [3] Sedum sect. Perrierosedum would later be elevated to genus by Japanese botanist Hideaki Ohba in 1978, re-designating the species Perrierosedum madagascariense. [4]
P. madagascariense is known only from Andringitra Massif in the Haute Matsiatra and Ihorombe regions of south-central Madagascar. It grows on rocky outcrops at altitudes of 1,600 m (5,200 ft) to 2,659 m (8,724 ft). [1]
P. madagascariense is a small perennial shrub growing 50–80 cm (20–31 in) tall. The branches are hairless and quadrangular. The fleshy leaves are sessile, borne opposite one another, measuring 2.5–5 cm (0.98–1.97 in) by 1.5–2.5 cm (0.59–0.98 in) with finely toothed margins. The inflorescence is a terminal corymbose cyme bearing three to ten flowers. The flowers measure approximately 10 mm (0.39 in) across and are hexamerous or, rarely, pentamerous. The petals are white with a red to orange tint and purple veins. [4] [5]
P. madagascariense is listed as critically endangered by the International Union for the Conservation of Nature under criterion B2ab(iii), based on its small area of occupancy and the decline of its habitat. It is known only from a single location within Andringitra National Park, and the size of the population is unknown. Despite occurring within a protected area, it is threatened by wildfires, grazing, and human disturbance from hikers and rock climbers. [1]
This species has been planted at the Botanical and Zoological Garden of Tsimbazaza in Antananarivo, Madagascar. [1]
The Crassulaceae, also known as the stonecrop family or the orpine family, are a diverse family of dicotyledon flowering plants characterized by succulent leaves and a unique form of photosynthesis, known as Crassulacean acid metabolism (CAM). Flowers generally have five floral parts. Crassulaceae are usually herbaceous but there are some subshrubs, and relatively few treelike or aquatic plants. Crassulaceae are a medium-sized monophyletic family in the core eudicots, among the order Saxifragales, whose diversity has made infrafamilial classification very difficult. The family includes approximately 1,400 species and 34–35 genera, depending on the circumscription of the genus Sedum, and distributed over three subfamilies. Members of the Crassulaceae are found worldwide, but mostly in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce, although a few are aquatic.
Sedum is a large genus of flowering plants in the family Crassulaceae, members of which are commonly known as stonecrops. The genus has been described as containing up to 600 species, subsequently reduced to 400–500. They are leaf succulents found primarily in the Northern Hemisphere, but extending into the southern hemisphere in Africa and South America. The plants vary from annual and creeping herbs to shrubs. The plants have water-storing leaves. The flowers usually have five petals, seldom four or six. There are typically twice as many stamens as petals. Various species formerly classified as Sedum are now in the segregate genera Hylotelephium and Rhodiola.
Joseph Marie Henry Alfred Perrier de la Bâthie was a French botanist who specialized in the plants of Madagascar.
Antonina Georgievna Borissova (1903–1970) was a Soviet botanist, specialising in the flora of the deserts and semi-desert of central Asia. Borissova authored 195 land plant species names, the ninth-highest number of such names authored by any female scientist.
Prometheum is a genus of plants in the family Crassulaceae.
Hylotelephium telephium, known as orpine, livelong, frog's-stomach, harping Johnny, life-everlasting, live-forever, midsummer-men, Orphan John, witch's moneybags, and garden stonecrop is a succulent perennial plant of the family Crassulaceae native to Eurasia. The flowers are held in dense heads and can be reddish or yellowish-white. A number of cultivars, often with purplish leaves, are grown in gardens as well as hybrids between this species and the related Hylotelephium spectabile (iceplant), especially the popular 'Herbstfreude'. Occasionally garden plants may escape and naturalise as has happened in parts of North America.
Rhodiola is a genus of perennial plants in the family Crassulaceae that resemble Sedum and other members of the family. Like sedums, Rhodiola species are often called stonecrops. Some authors merge Rhodiola into Sedum.
Phedimus spurius, the Caucasian stonecrop or two-row stonecrop, is a species of flowering plant in the family Crassulaceae. It is still widely listed in the literature as Sedum spurium.
Hylotelephium spectabile is a species of flowering plant in the stonecrop family Crassulaceae, native to China and Korea. Its common names include showy stonecrop, iceplant, and butterfly stonecrop.
Rosularia is a small genus of the family Crassulaceae. It includes about 28-35 species from Europe, the Himalayas, and northern Africa.
Hylotelephium is a genus of flowering plants in the stonecrop family Crassulaceae. It includes about 33 species distributed in Asia, Europe, and North America.
Dudleya candelabrum is a species of succulent plant known by the common names candleholder liveforever or candleholder dudleya. Endemic to California, this species grows wild only on the northern Channel Islands, where it is found in open rocky places and north-facing slopes. It is characterized by thin, spade-shaped green leaves and an inflorescence covered in long, reflexed bracts, with pale yellow flowers. It has been threatened by poachers shipping plants to South Korea.
Hylotelephium cauticola, the cliff stonecrop, syn. Sedum cauticola, is a species of flowering plant in the family Crassulaceae, native to Hokkaido, Japan. Growing to 8 cm (3 in) tall by 30 cm (12 in) wide, it is a carpet-forming succulent perennial with trailing stems of pink-tinged grey-green round leaves, and purplish pink star-shaped flowers in autumn.
Orostachys is a genus of the succulent family Crassulaceae that contains about 15 species. It is a biennial herb growing in China, Japan, Kazakhstan, Korea, Mongolia, Russia. Eight species occur in China.
Sempervivoideae is the largest of three subfamilies in the Saxifragales family Crassulaceae, with about 20–30 genera with succulent leaves. Unlike the two smaller subfamilies, it is distributed in temperate climates. The largest genus in this subfamily is Sedum, with about 470 species.
Kalanchoe × poincarei is a species of Kalanchoe native to southern Madagascar. Its scientific name is often misapplied to K. suarezensis and K. mortagei, but K. × poincarei is very different from them. The true K. × poincarei is a natural hybrid involving K. beauverdii, with similar sprawling stems up to 3 m in length, and not known in cultivation, whereas K. suarezensis and K. mortagei are erect, 30~60 cm tall and cultivated as ornamentals.
Dudleya saxosa subsp. collomiae, known by the common name Gila County liveforever, is a subspecies of perennial succulent plant within the genus Dudleya native to central Arizona. It is characterized by showy bright-yellow flowers on an upright inflorescence colored pink, red or orange. The leaves are green or covered in a white, powdery wax. This species is found growing in rocky slopes, canyons, and crevices, and often on Sonoran Desert sky islands.
Tylecodon wallichii is a species of succulent plant in the genus Tylecodon belonging to the family Crassulaceae. The species is named in honour of Nathaniel Wallich, early 19th century Danish plant hunter, botanist and physician.
Sedum microcarpum, commonly known as the small-fruited stonecrop, is a species of Sedum from the family Crassulaceae. It is native to Turkey, Lebanon, Israel, Palestine, Cyprus, and Syria. The plant is a short, bushy annual with white flowers. The leaves are succulent, narrowly oblong, and usually tinted red.
Hylotelephium ewersii, the pink Mongolian stonecrop or pink sedum, is a species of flowering plant in the family Crassulaceae. It is native to the high mountains of Asia, including the Altai, Tian Shan, and western Himalayas, and it has been introduced elsewhere, particularly to Scandinavia. A deciduous perennial reaching 15 cm (6 in), it is typically found in forests or in rocky crevices in ravines at elevations from 1,800 to 2,500 m. With its pink flowers and succulent blue‑gray leaves, and hardy to USDA zone 2, it has found use as a ground cover.
